综合物探方法在河南济源疙瘩深隐伏铁矿床勘查中的应用

河南省济源市疙瘩铁矿床深隐伏沉积变质型磁铁矿床,地面磁异常呈弱缓特征。常规的单一磁法辅助地质对确定矿体埋深尚显不足。矿区岩矿石的电阻率特征具备采用电法来推断赋矿地层的大致埋深和起伏形态,又基于地质体埋藏较深,因而布设了可控源音频大地电磁测深方法,推断出地质体的大致深度。在此基础上,对弱缓磁异常再进行反演。这样通过对可控源音频大地电磁测深(CSAMT)异常和弱磁异常进行综合研究,推断出的磁铁矿体产状及埋深为地质优化钻孔提供了较可靠的依据。这种综合物探方法对解决深隐伏磁铁矿地质问题具有借鉴意义。

Application of comprehensive geophysical prospecting method in the exploration of Geda deep hidden iron deposit,Jiyuan City,Henan Province

Geda iron deposit in Jiyuan City, Henan Province is a deep concealed sedimentary metamorphic magnetite field.The ground magnetic anomalies are weak and slow. Conventional magnetic method auxiliary geology is insufficient to determine the burial depth of ore body.In order to play the role of geophysical exploration means to solve geological problems,and to provide a more sufficient basis for drilling engineering,the controllable source audio geodetic electromagnetic sounding method is arranged to infer the approximate depth of the geological body.This paper tries to explain the comprehensive study of CSAMT anomalies and weak slow ground magnetic anomalies,the inferred embedded depth of the ore body can provide the basis for drilling engineering. It is useful for other similar mining areas.